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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6028) NPE server side when getting http://namenode/fileChecksum/*
Date Fri, 12 Jun 2009 14:24:07 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12718848#action_12718848
] 

Steve Loughran commented on HADOOP-6028:
----------------------------------------

web page contents
{code}
<RemoteException path="null" class="org.apache.hadoop.ipc.RemoteException" message="java.lang.NullPointerException"/>
{code}

stack trace 
{code}
09/06/12 15:21:58 INFO ipc.Server: IPC Server handler 3 on 8020, call getBlockLocations(null,
0, 9223372036854775807) from 192.168.66.129:36887: error: java.io.IOException: java.lang.NullPointerException
java.io.IOException: java.lang.NullPointerException
	at org.apache.hadoop.hdfs.server.namenode.INode.getPathComponents(INode.java:322)
	at org.apache.hadoop.hdfs.server.namenode.INode.getPathComponents(INode.java:317)
	at org.apache.hadoop.hdfs.server.namenode.INodeDirectory.getNode(INodeDirectory.java:124)
	at org.apache.hadoop.hdfs.server.namenode.FSDirectory.getFileINode(FSDirectory.java:776)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocations(FSNamesystem.java:721)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocations(FSNamesystem.java:687)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.getBlockLocations(NameNode.java:642)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:964)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:960)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:396)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:958)
{code}

> NPE server side when getting http://namenode/fileChecksum/* 
> ------------------------------------------------------------
>
>                 Key: HADOOP-6028
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6028
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.21.0
>            Reporter: Steve Loughran
>            Priority: Minor
>
> when using http://namenode/fileChecksum/*  to see if the checksum servlet is live, I
see an NPE message client side, and a stack trace on the namenode

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